Is it too late?

I want to buy the pass for the night and dawn event, but theres only two weeks left until the event ends. My main goal is to get either Nightbringer Lee Sin Prestige or 100 prestige points for K/DA Evelynn Prestige, but I dont know if I will have enough tokens by the time the event ends. It says I have 442 tokens in my stash, and the event pass gives 200, will the remaining missions for the next 2 weeks give me enough tokens for a prestige skin, or should I wait until next event? Please help